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Finding the Fourth Proportional to 118,321.76, 177,485.40 and 39,442.40

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Solution

The fourth proportional to 118,321.76, 177,485.40 and 39,442.40 is: 59,164.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,321.76 : 177,485.40 = 39,442.40 : x
  2. Step 2: Convert to fraction form
    118,321.76/177,485.40 = 39,442.40/x
  3. Step 3: Cross multiply
    118,321.76x = 177,485.40 × 39,442.40
  4. Step 4: Simplify right side
    118,321.76x = 7,000,450,140.96
  5. Step 5: Solve for x
    x = 7,000,450,140.96/118,321.76
  6. Step 6: Final answer
    x = 59,164.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.